Power-driven operator



April 1951 J. G. BAKER 2,549,562

POWER-DRIVEN OPERATOR Filed April 18, 1949 4 Sheets-Sheet l INV N OM (fl- Tonmsytf April 17, 1951 J. G. BAKER 2,549,552

POWER-DRIVEN OPERATOR Filed April 18, 1949 4 Sheets-Sheet 2 INVENTQM' cn. x- S -K v- April 17, 1951' J. ca. BAKER 2,549,552

POWER-DRIVEN OPERATOR Filed April 18, 1949 4 Shee ts-Sheet 5 5: N v s. N -r o h April 17, 1951 J, BAKER 2,549,562

POWER-DRIVEN OPERATOR Filed April 18, l949 4 Sheets-Sheet 4 EENVE-NTOM dchn G- @akev" Patented Apr. 17, 1951 (UNITED STATES PATENT OFFICE POWER-DRIVEN OPERATOR John Gordon Baker, Evansville, Wis., assignor to L Baker Manufacturing Wis., a corporation of Wisconsin Application April 18, 1949, Serial No. 88,180

2 Claims. (01. 74 42 tion between the operator and the pump rod must be mounted 1 to slide in suitable guide surfaces or otherwise held in .astraightpath. In such cases, it has been the practice heretofore to mount the guiding elements within the 'oil casing which not only necessitates a substantial enlargement of the casing, but also precludes effective sealing of the latter.

The primary object of the present invention is to overcomethe foregoing objections and effectually seal the operator casing by dividing ,the tube at vertically spaced points.

ing the'uppermost bolt 2| and disconnecting thepump rod from the operator, the latter may be' swung into anoutof the way position as shown;

Company, Evansville,

The operator casing I2 is of oblong shape and relatively fiat, and is composed of two dished castings I2? and l2 which are flanged at their openends and clamped together by bolts I8. To mount the casing directly on the pump tube I3, the lower end portion is clamped by the lowermost bolts I8 to the top edges of triangular plates [9, the vertical edges of which extend down along the pump tube 13 and are clamped detachably as bybolts 2| to lugs 20 projecting outwardly from By removin phantom in Fig. l.

The motor In is mounted on a pad 22 on the top of the casing I 2, and its shaft carries a pulley 23 connected by belts 24 to a larger pulley 25 which is fast on the outer end of a shaft 26. .The

latter projects horizontally through the casing 'l 2 and is journaled at opposite ends in bearing bosses 2! formed in the side walls of the casing the oscillating and rotary parts of th'e operator in a novel manner and locating outside'of the. oil casing those parts which do not require automane-lubrication r A more detailed object is to mount the rocker arm externally of the gear case and guide the pump irod :in :'a' truly rectilinear path through the use of 'anauxiliary' rocker arm also mounted on the gear externally thereof.

The invention also resides in the novel construction and arrangement of the externally mounted parts.

Other objects and advantages of the invention will become apparent from the following detailed adjacent the verticaljedge thereof remote from the pump rod. Intermediate its ends, the shaft. carries a pinion 28 meshing with teeth on the, periphery of a larger gear 29 disposed below the drive shaft and journaled on a parallel stud 30 projecting inwardly from the casing part l2 description taken in connection with the accompanying drawings, in which: Y

Figure 1 is a side elevational view of a pump operator embodyingthe novel features of the present invention, the operator being mounted on a pump casing.

Fig. 2 is a fragmentary elevational view flooking'from the right in Fig.1.

Fig.3 is a perspective view of the link connec- 1 tion between the operator and the pump"rod.-

Fig.4 is a section taken alongthe line 4-4 of Fig. 2. V V H Fig. 5 is a section taken along the line 5--5 of Fig. 4.

For purposes of illustration, the invention is shown in the drawings incorporated in an operator driven by an electric or other kind of motor lo-for reciprocatinga pump rod H which is unguided and projects upwardly beyond theupper end of a casing or tube l3 on which the operator casinglZ is mounted rigidly. v Herein, an apertured connector head threaded onto the upper end of the pump rod' II isformed with a depending .cap l5, 'yvhich fits over "and; telescopes with a tubular extension'lG' on a cover I! closing the well casing.

about midway between the casing edges. The

components of the speed reduction gearing thus formed are held in a common plane, this being accomplished herein by collars 3| fast on the shaft 26 between opposite ends of the pinion and the adjacent ends of the bearing bosses 21.

Rotary motion of the gear 29 is converted into oscillatory motion of a shaft 32 which is disposed above and parallel to the drive shaft 26 with its opposite end portions projecting out-- wa'rdly through and journaled in bearing bosses 33.integral with they casing parts. Fast on the driven shaft within the casing is the hub 34 of a rocker arm or web35 whichis disposed substantially in the plane of the gear 2 8. At its freeend,

the arm is formed with a sleeve 36 in which 'isjournaled one leg 31 of a C-shaped pitman 38 v whose intermediate straight portion lies alongside'the gear 29 between the latter and the casing wall Il The leg 31 may be held against endvwise movement in the sleeve by a snap ring 31 or The other or lower leg 40 of the like (Fig. 5). the pitman is journaled in a crank bearing 4i disposed eccentrically in the gear 29, the pitman end being in this instance free to slide endwise in its bearing. It will be seenthat as the gear rotates, the arm 35 and therefore the shaft 32 will be rocked back and forth through an angle determined by the throw of the crank and the' length of the arm.

In accordance with the present invention, a

connection disposed outside of the operator casing and composed entirely of oscillating and piv- 'otally connected parts is utilized to convert the The motion transmitting elements of the connec- 5 tion comprise arms 42 clamped or otherwisemade fast on the outwardly projecting ends of the shaft 32 and projecting horizontally beyond'v the edge of the operator casing'to points spaced above the upper end of the well casing. The arms are positioned angularly on the shaft so as to swing through substantially equal arcs above and below the horizontal to limit positions shown inful1 and in phantom in Fig. 1. At their free ends, the arms are joined by pins 43 to depending legs 44 of an inverted U-shaped yoke 45 which straddles the upper end of the pump rod. II and forms a link connection between the latter and the rocker arms. The connection is completed byapin 46 .projecting through the apertured head [4 on the pump'rod to join the head pivotallyto spaced lugs- 41. depending from the closedend of the yoke andstraddling the head. The arrangement is such that when the rocker arms 42 are disposed in horizontal position, the pins 43 will intersect the .axis of the pump rod.

Guiding of the pump rod in a true rectilinear path is effected by an auxiliary-rocker arm 48 pivoted on the operator casing l2 and acting on theiyoke link it to rock the latter about the pivot pins 33 and compensate for the'foreshcrtening of thearms 42 as the latter swing away from the horizontal. The guide arm 48 ,is mounted to swing in the plane of the adjacent rocker arm 42, and one end thereof is pivoted on arstud 43 cast integral with the casing part I2 and projecting outwardly therefrom parallel to the rockshaft 32. The other end of the arm 43 is connected by a pivot pin 58 to the lower end of a rigid extension.

5l-of one of the yoke arms 44. The auxiliary arm 48,: which is somewhat shorter than the arms 42.

in this instance, is rocked up and down substantiallyequal distances from the horizontal between the limit positions shown in full outline and in phantom in Fig. 1.. In the movement of the auxiliary arm in either direction away from duced by the horizontal shifting of the fulcrum pivot 43 due to thearcuate movement of the latter.

range of movement of the arms 42 so as to. insure movement of the pivot 46 in a straight line.

In operation, oscillation of the rocker arms.

42 upwardly and downwardlyresults in raising In other words, the position of thepivot. 5B and the lengths of the arm 48 and theyoke. parts 44 and El are correlated with the length of and lowering of the pump rod between the lower I position shown in full in Fig. 1 and the upper position shown in phantom. The guide arm 48 is similarly rocked by virtue of its connection with the adjacent arm 42 and acts to rock the link 45 about the pivot 43 as a fulcrum, thus compensating for the foreshortening of the. arms 42 thus causing the axisof the pump rod pivot 46to reciprocate in a single plane.

It will be noted that all of the motion transmit-v ting parts which are disposed externally of the operator casing 12 are, connected together and, to the pump rod at pivot joints which are easily sealed against dirt andeasily lubricated more or 4 less permanently. Thus, only the parts of the speed reducing and motion, convertin mechanisms need be mounted within the casing which, therefore, may be made of minimum size. Moreover, by separating the motion converting mechanismat the oscillating shaft 32. the casing is sealed efiectually against the escape of lubricatin'g oil, and the entry'of water or foreign matter into the casing isprevented. "Therefore, through the use. of the present invention, greater simplicity and compactness in the arrangement of the operator parts has been achieved, and the service life of the operator has been prolonged without the necessity of. more frequentlubrication ofthe exposed parts.

This application is a continuation-in-part of. my copending applicationSerialNo. 33,639, filed casing coupled to saidv shaft for rockingthe same back and forth, an arm fasto'n said shaft outside of said casing, a .lever fulcrumedintermediate its ends on the freesend-ofsaid'arm toswing about an axis parallelingsaid'shaftmeans at one end of said-lever for. connecting the latter to a. part to be reciprocated in a straight line, a rigid 7 link shorter than said arm and pivotallyconnected at one end to theotheriend of said lever,v

and means rigid with said casing Wallproviding a pivot supporting theotherendof. said link to swing about an axis paralleling said rocksh-aft and disposed-between the latter and said straight line, the length of said link being correlated with the arm andlever to maintain. said connecting.

means on said straight line during: rocking of said shaft. v x J 2. In a motion converting mechanism, thelcombination-of, a casing adapted t o containa l'ubrie cant, a rockshaft projecting outwardly'through a wall of said casing,,and 'journaled therein,

power rotated means within said casing coupled to the inner portion of said shaft. and operable to rock the same back and forth, an arm fast on said shaft-outside'of said casing, a .lever fulcrumed intermediate its ends on the free end ofsaid arm to swing about an axis paralleling said shaft, means at one end of said lever for connecting the latter to arpart toube .reciprocatedina straightline, a rigid link pivotally'. connected at.

oneqend to the other end of said, lever and projecting from the lever toward saidcrockshaft in atleastone position.of-thelatter, and means rigid with said casing wallprovidingaa pivot supporting theotherend of said link. to swing about an axis paralleling said. rockshaft, the. length of said link being correlated with the arm'and lever to maintain said connecting means on said. straight line during rocking of said shaft.

JOHN GORDQN BAKER.

REFERENCES CITED The following references are of record in the file of this patent:

" UNITED STATES PA-TENTS i Number Name Date 1,164,455 Blackaller Dec. 14, 1915 1,470,63 l Myers.. .Oct. 16, 1923 Myers Mar. 9, .1926 

